How To Proceed With Troubleshooting [07/2022 - ]: Procedure

CUSTOMER PROBLEM ANALYSIS

HINT:

In troubleshooting, confirm that the problem symptoms have been accurately identified. Preconceptions should be discarded in order to make an accurate judgment. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time the malfunction occurred.
Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases.
The following 5 items are important points for problem analysis:

What	Vehicle model, system name
When	Date, time, occurrence frequency
Where	Road conditions
Under what conditions?	Driving conditions, weather conditions
How did it happen?	Problem symptoms

Result

Proceed to
NEXT

Result:

See step 3

PRE-CHECK

Check the connectors and terminals to make sure that there are no abnormalities such as a loose connection or deformation.

Result

Proceed to
NEXT

Result:

See step 4

INSPECT COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*

Using the Techstream, check for CAN communication system DTCs.

Result

Result	Proceed to
CAN DTCs are not output	A
CAN DTCs are output	B

Result:

Result:

See step 5

INSPECT COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM*

Using the Techstream, check for LIN communication system DTCs.

Result

Result	Proceed to
LIN DTCs are not output	A
LIN DTCs are output	B

Result:

GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer to DIAGNOSTIC TROUBLE CODE CHART [07/2022 - ]

Result:

See step 6

OVERALL ANALYSIS AND TROUBLESHOOTING*

Data List / Active Test

Result

Proceed to
NEXT

Result:

See step 7